What is the production process of small roll thermal label paper?

The production process of small roll thermal label paper is a complex and delicate process, which mainly includes the following key steps:

First, paper base selection

The bottom layer of thermal label paper is a paper base, usually a paper with a certain thickness and strength is used as a substrate. These papers need to have good stability and durability to ensure that they are not easily broken or deformed during printing and use.

Second, pre-coating treatment

Some thermal labels are pre-coated during the production process. This step may include a first precoat with a relatively coarse particle size coating, the formation of a first precoat, and drying. Then, a second pre-coat is applied with a relatively fine particle size coating to form a second pre-coat and dried again. The main purpose of the pre-coating is to improve the surface properties of the paper and improve the adhesion and uniformity of the subsequent coating.

Third, heat sensitive coating

The thermal coating is the core part of the thermal label paper, which is mainly composed of thermal pigments (such as colorless dyes, phenols or other acidic substances), polymers and other additives. Thermal pigment is a key part of thermal paper, which contains compounds that can produce biochemical reactions under hot conditions. These compounds release heat after the reaction, causing the color of the coating to change. The polymer acts as a bond for the heat-sensitive pigment to the paper substrate.

The coating process usually uses rollers or other coating equipment to evenly coat the heat-sensitive coating on the paper substrate. During the coating process, the thickness and uniformity of the coating need to be strictly controlled to ensure the print quality.

Fourth, dry treatment

After the heat sensitive coating is applied, it needs to be dried to remove moisture from the coating. There are a variety of drying methods, including air drying at low temperatures and rapid drying using ultraviolet lamps. The drying process not only helps to remove moisture, but also ensures the gloss and flatness of the coating.

Fifth, protective coating (optional)

In order to improve the durability and adhesion of heat-sensitive label paper, a protective layer is sometimes covered on the heat-sensitive coating. The protective layer can absorb some of the light that causes the chemical reaction of the thermal coating, slowing the deterioration of the printing paper, while protecting the thermal components of the printer from damage. The coating and drying method of the protective layer is similar to that of the heat-sensitive coating.

Sixth, cutting and packaging

Cut the coated and dried thermal label paper according to the required specifications to form a small roll or a specific shape of the label paper. Then, the cut heat-sensitive label paper is packaged to prevent moisture, contamination and damage. The packaging material is usually moisture-proof paper or plastic film, and the relevant information and instructions of the product are marked.

Seventh, quality testing

In the entire production process, strict quality testing of raw materials, semi-finished products and finished products is required. The test content includes the flatness of the paper, the uniformity of the coating, the printing effect and the durability. These testing measures help to ensure that the quality of thermal label paper meets standards and customer requirements.

Eighth, environmental protection and safety

The production process of thermal label paper also needs to pay attention to environmental protection and safety issues. In the selection of raw materials and chemicals, we should try to choose environmentally friendly materials to avoid pollution to the environment. At the same time, in the production process to strictly abide by the safety operation procedures to ensure the personal safety of staff.

In summary, the production process of small roll thermal label paper is a complex and fine process, involving multiple links and steps. By continuously optimizing the production process and technical means, the performance of thermal label paper can be further improved and the cost can be reduced to meet the diversified needs of the market.